1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4bde94b00de0b8575cad4a24c31183c85f54d57efb9916d65af556f08385e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22a08a8b-9863-455f-9595-94266197112c.json and https://artists.proofprofile.net/proofs/artist/22a08a8b-9863-455f-9595-94266197112c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd1d6c62ecb44d3babfde546efbe26df746834f3c41b9cb93af138581358ac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2150742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb53162f4004d72ea38c9a107d0b16e4e3ba52b3014cb3654c5138519cd7e5d2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542361246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7981157bb0db444b79275eeab25c8c5b36cd7fc0bc5ef3b371f89457dc7ab6b0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542366237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad22568f7ef8f305fd0aae6599739140bf795983c2f6caeb63532c2430f849. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82412934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e4f5c4b16d9bef5cd6986c0fa6e6a61047bbf0130694a0d026c5f01915598. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542430888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24380a16f89de4aa36eb73d3806908464f91a653269eb022be0c949d279ff651. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2413564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c4dd15baae835c058ede0639c32490e083711ebe8a4c9006b1d5a0f683661e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA062447262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d8199d6b30c173a1ef75466dc3b649dd596198a94a1d4b3c76b491e4ae02d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542464461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328bba4a742716cde59c08e3dfa961dd83c55c2e91795c78f2c8c6f28d754ac. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2564502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c927e5697bfc2142a3196a7cb99f266ad1ef29f7fc1ef9971583321ab1934. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2343160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5f199105bdf1d13441cdd2513a223e5f0e199b0544186b05a6b6f2ade332d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY52300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb9fea13851ff3442032f2242a526fec6e32164db0d1c1e8fda6dfe4b2fe77b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2038713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b45bf0c840b5f25f0ba856bfc8a437597dfac52155214e7ebc186891387c459. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542214582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f13214987592a9afbc799fe8bebe4e9cd55889191381fd6b09957b2d30d070. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2129652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc379bca2bb83a6c76718183b0aef1f8c4924e268446a6b9e1e9dd735be01e588. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS652240141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96138f4e174ccc0e188c188cb4c3d45fa22a56586ad4b10d0e7d60a9a89820ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK42232051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fad1dadb63f9cc4bac359c1662135ef09bf8a8a6e8c280bf812ca6e7198feb7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZKDK2269381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25e6b66dd317ff8cbb856ea5c8eeeb1acfc48ba0479d196828b6f3517683eba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX3EP1412120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851c13975b9948f15f2d509305484c5c98915659b50dc166cb19a8d7c869e0af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2254189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a281a745bd7993aa78f5a409b115271ec2bd5d5980cfc06c2d7895625023c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL1XF2100008.